Bootloader running from Flash

Hello,

I have a small problem with my bootloader. I finally made my bootloader to run from flash and receiving the data from pc correctly. I am using an XMC4500 with Dave4.

The space reserverd for the bootloader ranges from 0x0C000000 to 0x0C003FFF.
I erase/write with these functions Flash002_EraseSector (uint32 Address) and Flash002_WritePage (uint32 Address, const uint32 pBuf[]) from the FLASH0002 App. I implemented it into my Dave4 Project

Here are some defines. I made the unchaed Base to start at 0x0C004000 because of the offset in the program that should be later loaded into the flash.

Code:

#define FLASH002_SIZE 1024U

/** Base address of the uncached area of the Flash array*/

#define FLASH002_UNCACHED_BASE  0x0C004000U

/** Base address of Sector-0*/

#define FLASH002_SECTOR0_BASE   FLASH002_UNCACHED_BASE

/** Base address of Sector-1*/

#define FLASH002_SECTOR1_BASE   (FLASH002_UNCACHED_BASE + 0x4000U)

/** Base address of Sector-2*/

#define FLASH002_SECTOR2_BASE   (FLASH002_UNCACHED_BASE + 0x8000U)

/** Base address of Sector-3*/

#define FLASH002_SECTOR3_BASE   (FLASH002_UNCACHED_BASE + 0xC000U)

#if FLASH002_SIZE>=128U

/** Base address of Sector-4*/

#define FLASH002_SECTOR4_BASE   (FLASH002_UNCACHED_BASE + 0x10000U)

/** Base address of Sector-5*/

#define FLASH002_SECTOR5_BASE   (FLASH002_UNCACHED_BASE + 0x14000U)

/** Base address of Sector-6*/

#define FLASH002_SECTOR6_BASE   (FLASH002_UNCACHED_BASE + 0x18000U)

/** Base address of Sector-7*/

#define FLASH002_SECTOR7_BASE   (FLASH002_UNCACHED_BASE + 0x1C000U)

#if FLASH002_SIZE>=256U

/** Base address of Sector-8*/

#define FLASH002_SECTOR8_BASE   (FLASH002_UNCACHED_BASE + 0x20000U)

#if FLASH002_SIZE>=512U

/** Base address of Sector-9*/

#define FLASH002_SECTOR9_BASE   (FLASH002_UNCACHED_BASE + 0x40000U)

#if FLASH002_SIZE>=768U

/** Base address of Sector-10*/

#define FLASH002_SECTOR10_BASE  (FLASH002_UNCACHED_BASE + 0x80000U)

#if FLASH002_SIZE>=1024U

/** Base address of Sector-11*/

#define FLASH002_SECTOR11_BASE  (FLASH002_UNCACHED_BASE + 0xC0000U)

Code:

/*

 *  The function programs one page of the Flash using

 *  WritePage command

 */

status_t Flash002_WritePage (uint32 Address, const uint32 pBuf[])

{

  uint32 status = (uint32) FLASH002_ERROR;

  uint32 i;

   /* <<<DD_FLASH002_API_3>>> */



  /*validate the Address*/

  if ((Address < FLASH002_UNCACHED_BASE) || (Address > FLASH002_UNCACHED_LIMIT) || \

       ((Address & FLASH002_PAGE_MASK) != 0U))

  {

    status = (uint32) FLASH002_INVALID_PARAM;

  }

  else

  {

    /* Clear the flash status register */

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000F5U;

    /* Enter page mode, program flash*/

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x00000050U;

    /* Load Assembly Buffer*/

    for (i=0U; i <(FLASH002_PAGE_SIZE/8U); i++)

    {

      M32(FLASH002_UNCACHED_BASE + 0x55F0U) = pBuf[2U * i];

      M32(FLASH002_UNCACHED_BASE + 0x55F4U) = pBuf[(2U* i) + 1U];

    }



    /*Launch the write Page command*/

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000AAU;

    M32(FLASH002_UNCACHED_BASE + 0xAAA8U)=0x00000055U;

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000A0U;

    M32(Address)=0x000000AAU;



    /*wait until the operation is complete*/

    while (FLASH0->FSR & FLASH_FSR_PBUSY_Msk)

    {

      /*do nothing*/

    }

    /* Check if any error occurred during the operation*/

    if((FLASH0->FSR & FLASH002_FLASH_ERROR_MSK) == 0U)

    {

      status = (uint32) DAVEApp_SUCCESS;

    }

  }

  return status;

}

Code:

/*

 *  The function programs one page of the Flash using

 *  WritePage command

 */

status_t Flash002_WritePage (uint32_t Address, const uint32_t pBuf[])

{

  status_t status = (uint32_t) FLASH002_ERROR;

  uint32_t i;

   /* <<<DD_FLASH002_API_3>>> */



  /*validate the Address*/

  if ((Address < FLASH002_UNCACHED_BASE) || (Address > FLASH002_UNCACHED_LIMIT) || \

       ((Address & FLASH002_PAGE_MASK) != 0U))

  {

    status = (uint32_t) FLASH002_INVALID_PARAM;

  }

  else

  {

    /* Clear the flash status register */

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000F5U;

    /* Enter page mode, program flash*/

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x00000050U;

    /* Load Assembly Buffer*/

    for (i=0U; i <(FLASH002_PAGE_SIZE/8U); i++)

    {

      M32(FLASH002_UNCACHED_BASE + 0x55F0U) = pBuf[2U * i];

      M32(FLASH002_UNCACHED_BASE + 0x55F4U) = pBuf[(2U* i) + 1U];

    }



    /*Launch the write Page command*/

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000AAU;

    M32(FLASH002_UNCACHED_BASE + 0xAAA8U)=0x00000055U;

    M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000A0U;

    M32(Address)=0x000000AAU;



    /*wait until the operation is complete*/

    while (FLASH0->FSR & FLASH_FSR_PBUSY_Msk)

    {

      /*do nothing*/

    }

    /* Check if any error occurred during the operation*/

    if((FLASH0->FSR & FLASH002_FLASH_ERROR_MSK) == 0U)

    {

      status = (uint32_t) DAVEApp_SUCCESS;

    }

  }

  return status;

}

The stauts i receive after each write/erase is an Error (0x02). When i define FLASH002_UNCACHED_BASE as 0x0C000000 the status seems successfull, but when i check the memory in the monitor
it always shows that nothing has been written to the address.

The loaded program should start at 0x0C004000.

I made an offset in the linker script file of the program which will be loaded by the bootloader.

Code:

MEMORY

{

        FLASH_1_cached(RX) : ORIGIN = 0x08004000, LENGTH = 0xfc000

        FLASH_1_uncached(RX) : ORIGIN = 0x0C004000, LENGTH = 0xfc000

        PSRAM_1(!RX) : ORIGIN = 0x10000000, LENGTH = 0x10000

        DSRAM_1_system(!RX) : ORIGIN = 0x20000000, LENGTH = 0x10000

        DSRAM_2_comm(!RX) : ORIGIN = 0x30000000, LENGTH = 0x8000

}

is this correct so far?

If there is no incoming sign from the pc side, the program in the flash should be started.
I used this function to jump to the address 0x0C004000.

Code:

void RunFlash(void)

{

           __asm(

                     "ldr r0, =0x0C004000\n"

                 "ldr r1, =0xE000ED08\n"  //VTOR register

                         "str r0,[r1]\n"

                     "ldr sp, [r0], #4\n"

                 "ldr r15, [R0]"

                        );

}

But this seems not to work. I always get the message

-- No source available for "0x80042b0" --

Can somebody please help me?